package com.culturaltourism.core.utils;

import java.security.MessageDigest;

/**
 * @ClassName: MD5Util
 * @Description: MD5加密工具
 * @Author MaShuai
 * @Date 2019/5/1 19:20
 * @Version V1.0
 */
public class MD5Util {

    private static String byteArrayToHexString(byte bytes[]) {
        StringBuffer stringBuffer = new StringBuffer();
        for (byte aByte : bytes) {
            stringBuffer.append(byteToHexString(aByte));
        }

        return stringBuffer.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0) {
            n += 256;
        }
        int d1 = n / 16;
        int d2 = n % 16;
        return HEX_DIGITS[d1] + HEX_DIGITS[d2];
    }

    public static String MD5Encode(String origin, String charsetname) {
        String resultString = null;
        try {
            
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            if (charsetname == null || "".equals(charsetname)) {
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes()));
            } else {
                resultString = byteArrayToHexString(md.digest(resultString
                        .getBytes(charsetname)));
            }
            
        } catch (Exception e) {
            e.printStackTrace();
        }
        return resultString;
    }

    public static String getMD5Code(String origin) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            resultString = byteArrayToHexString(md.digest(resultString
                    .getBytes("utf-8")));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return resultString;
    }

    private static final String[] HEX_DIGITS = {"0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"};
}
